Picture-exhibiting machine.



G.A.BRAU N. PICTURE EXHIBITING' MACHINE.

APPLIOATION FILED OUT. 20, 1910.

1,082,260. Patented Dec. 23,1913.

8 SHBETSBHEET l.

Q QM

G.A.BRAUN.

PICTURE- EXHIBITING MACHINE.

APPLIUATIOK FILED 0m. 20, 1910.

1,082,260. Patented Dec. 23, 1913.

8 SHEETS-SHEET 2.

we-9 w {11 C. A. BRAUN. PICTURE BXHIBITING MACHINE.

APPLICATION TILED 001. 20, 1910.

Patented Dec. 23, 1913.

8 SHEETS-$HEET 3.

Patented D90. 23, 1913.

G. A. BRAUN. 'PIGTURE EXHIBITING MACHINE.

APPLIOATION FILED-00120, 1910.

a igZU IZZUY 0. A. BRAUN; PICTURE EXHIBITING MACHINE. APPLIOATION FILED001. 20, 1910.

Patented Dec.23,1913

8 SHEETS--BHEET 6.

0. A. BRAUN.

PICTURE EXHIBITING MACHINE. ArrmoATIon' .rnnn 001. 20, 1910.

Patented Dec. 23, 1913.

JFZUGTZW M 0. RAU PICTURE EXHIBITING MACHINE. APPLICATION FILED 001. 20,1910.

Patented Dec.23,1913

G. A. BRAUN.

PICTURE BXHIBITING MACHINE.

APPLICATION mum 0011'. 2o, 1910.

Patented Dec. 23,1913.

8 sums-sum 6.

. nated above,

CHARLEfi A. Blt'tdt'llltl, Uli CHIUAGO,

rumors,

ASSIGNOR, BY MESNE AS$IUNMIENT$ than munaronn'anronarre apvnn'rrsme co.

lEIfJTUJltE-EKHIIBIIHNG MACHINE.

specification of Letters Patent.

Application filed October 20, 1910. Serial No. 588,054.

To all whom it may concern Be it known that i, Crrnnnns A. BRAUN, acitizen of the United States, residing at Chicago, in the county-ct CookandState of Illinois, have invented new and useful Improvements inPicture-Exhibiting Machines, of which the following is a full, clear,conelse, and exact description, had to the accompanying drawing, forminga part of this specification.

-My invention pertains, in general,-to slide magazines for pictureexhibiting lanterns and to mechanisms for use in connection with suchmagazines; it particularly relates to magazines of the character inwhich the 'magazine comprisesv a hollow drum provided with means forsupporting the slides radially therein, and having an elevator associated therewith for removing the slides, bringing them into the correctposition in the lantern, and replacing them in the drum. It is theprincipal object of my invention to simplify the construction of slidemagazines, to increasetheir capacity, and to improve uponthem'generally; also, when the magazine is actuated automatically, toprovide actuating mechanism which is simple, certain of operation, andnot liable to get out of order. Y A further object is to provideslideinagazines of the character particularly desigwith mechanismswhereby they are automatically actuated at predetermined intervals.

lit is' a still further object to provide slide magazines withmechanisms whereby they may be actuated from a distance with certaintyand precision. And other objects of my invention will appear from thefollow ing specification. i

I have embodied my invention in a working device, and in order that theinvention may be understood, this device is shown in the accompanyingdrawings, and described in the following specification. I do not limitmyself, however, to the particular apparatus which I have chosen todescribe since numerous changes may-be made with out exceeding the scopeof my invention as expressed in the appended claims.

n the drawings: Figure l is a. front elevation of a picture exhibitinglantern, magazine, and actuating devices therefor, constructed inaccordance with my invention; Fig. 2 is an, elevation of the same asseen 5-5 of. Fig. reference being mg taken on t above the a pair ofguard flanges are from the right-hand sideof Fig. 1; Fig. 3 is anelevation of the same as seen from the left-hand side of Fig. 1; Fig. 42is an enlarged vertical section taken on the line 4 L of Fig. 1, lookingin the direction of the arrows; Fig. 5 is a section taken on the line 6;F igz, 6 is an enlarged section taken on the line 66 of Fig. 2; Fig. 7is a sectional elevation showing the cod struction of the shutter, thesection being takenon the'line 7-7101 Fig. 3; Fig. 8 is a fragmentary,partly sectional, detail view showing a portion of the drivingwheel forthe pitman shaft, thesection being taken on the line 8-8 of Fig; 6; Fig.9 is a detail section of the'safety make-and-hreak de'vice, thesectionbeing taken on the line 9 9 of Fig. 6,- Fig. 10 is a fragmentarydetailview of the slide su porting drum, the section bee line 10-40 of Fig. i;Fig. 11 is a horizontal section taken on the line 11'11 of Fig. 4; Fig.12 is a diagram of connections; and Fig. 13 is a detail sectional viewshowing the-docking device for the counter-shaft, on line l3 -l3 Fig. 6.

The apparatusshown in the accompanying drawings comprises a drum mountedlantern and provided with a series of radial slide-receiving guides theouter ends of which are open. I order to prevent the slides which arecarried by those guides which are located below the plane of the axis ofthe drum from slipping out of the guides, the edge of the lower part ofthe drum. (he bottom corners of the slides engage these flanges andslide upon them as soon as, by reason of the revolution of the drum, theslides tend to fall outof the guides. The guard flanges are formed, at apoint substantially vertically below the axis of the drum, with openingsof sufficient width to allow a :slide to pass therethrough. An vator isarranged immediately below these openingsand mechanism is provided forin, termittently raising and lowering the elevator and at the same timerotating the'drum through a distance equal to the space be tween two ofthe slide guides. Qldy the rais: ing (11'' the elevator, a position forexposure and which had previously. been carried down from the, slideguides immediately above the openings in the guard flanges,

vacant guides in the drum. Just after. the its Patented nee. iais.

slide, which had been in.

will be raised hitotlie slide has entered its guides, the drum starts torevolve and thereby brings the slide carried by the next pair of guidesinto position upon the elevator. The elevator then descends and bringsthe slide into position for exposure. 'After such-a time has elapsed asis considered sufiicient for exposing the slide,

, the above operation will recur and the slide which has been exposedwill be replaced by the next in order in the drum. The elevator, justbefore it reaches the limit of its downward movement, effects theopening of a shutter, the latter being automatically closed as soon asthe elevator begins to rise. By this means reproduction, upon thescreen, of the movement of the slides is avoided. The device, asoutlined below, is of considerable use in displaying pictures foradvertising I drum rotatably mounted upon a shaft 21 having its bearingsin standards 22 and 22 secured to a base 23. These standards carrybetween their lower ends the lantern 2 1, which may be of any desiredconstruction and the details of which it is not necessary to describe.The drum consists of a pair of oppositely disposed side plates connectedat their centers by hollow bearings 25 (Fig. 6). Secured to the innerfaces of these side plates are a plurality of radially disposed metallicstrips26 which are bent into the form of open-ended loops with thecurved bases of the loops disposed toward the periphery of the drum.These strips 26 are so spaced as to form between them guides 27 for theslides 29 (Figs'a and 10), intowhich guides the slides may be insertedfrom the top of the drum, the curved portions of the strips providing atapering opening for the guides, which enables the slides to be insertedinto them with facility. Circular flanges 28 are provided adjacent theinner ends f the guides 27- to support the inner ends of those slideswhich are located in the upper portion of the drum. As the drum rotates,those slides which were in the upper portion of it will be brought downinto a position in which. they will tend to fall out of the guides 27.In order to prevent the slides from falling out of the guides, guardflanges 30 are provided. The flanges 30 are,

slide upon the guard flanges 30. The convexity of the guard flanges ismade somewhat greater than that of the drum so that the centers of theguard flanges are somewhat farther from the periphery of the drum thanthe ends are. "By this means the slides are caused to slip out of theguides to a certain extent before they reach the limit or their downwardmovement and enough room is provided for thefoperation of the elevator.Immediately below'the axis of the drum, theguard flanges 30 are providedwith openings 30 of suflicient width for a slide to pass therethrough.

The shaft 21 (Figs. 2 and 6) has mounted upon one end thereof ageanwheel 32 which meshes with a second gear wheel 33 carried by anintermittently driven counter-shaft 34. The counter-shaft is rotatablymounted at one end in a bearing 35 carried by pne of the standards 22and is mounted at the other end in a bearing 36 formed upon a bracket 37which is secured at its ends to the standard 22. The number of teethupon the wheels 32 and 33 is the same, so that the shaft 21 will rotateat the same speed as the counter-shaft 34. Upon the inner end of thecounter-shaft 3a is mounted a disk 38. formed at one side with anarcshaped recess containing a pin 39. The disk 38 and pin 39, togetherwith a suitably recessed flange 40 carried by the outer face of theadjacent side plate of the drum, constitut'e a Geneva movement fordriving the drum. It will be seen, therefore, that each revolution ofthedisk 38 will result in a movement of the drum through a circumferentialdistance equal to the distance between the recesses ofthe flange 40,which recesses are spaced apart a distance equal to that between theslide guides 27, while the drum is securely locked against movementexcept during such time as the pin 39 enters one of the recesses of theflange 40. The disk 38 is so placed upon the countershaft 34 that thepin 39 will effect the movement of the drum just after the elevator (tobe hereinafter described) reaches its uppermost position.

Secured to the end of the shaft 21 opposite to that which bears the gearWheel 82,

is a crank 41 which is connected by means of a pitman42 (Figs. 3, 6 and11) with the elevator. The elevator comprises a block 43 which isslidahly mounted upona vertical pillar 44 carried by the standard 22 theblock being forme with a laterally project 130 guide grooves 51 and 51*.which grooves arearm 45 extending between the standards 22 and 22 andlocatedin substantially extending ears 47 by means of which it isattached to the standards 22 and 22. The central portion of the plate 46is cut away .to allow the passage of light in order to exhibit. thepictures, and the top edge ofthe plate extends upwardly into theopenings 30 in the guard flanges 30 of the drum, be-

ing cut off flush with the upper surfaces of these flanges. Verticalstrips 48 and 48 are secured to the edges of the plate 46 adjacent tothe standards 22 and 22, respectively, the inner edges of these stripsbeing located somewhat within the vertical edgesof the openings in theplate 46. Upon the strips 48 and 48 are mounted 1 other strips 49 and.49, the vertical edges of which extend beyond the vertical edges ofthestrips '48 and 48*.* The strips 48 and 48?, 49 and 49 form, with theplate 46, a pair of Vertical .of sufficient width. to receive and guidea slide when thelat-ter is carried up or down bythe elevator. The outerend of the arm is provided with a-lug which enters the groove 51,whereby the arm 45 will be I accurately guided in its verticalmovements.

The normal condition of the parts (that is, the condition in which apicture is be- .ing exhibited) is shown in Figs. 4 and 6 In thiscondition of the of the drawings.

'.parts-the arm 45 is in its lowermost position and carries upon itsupper edge a slide 29' which hasbeen Withdrawn from the slide guides 27located immediately above the openings 30 in the guard flanges 30.-When,

after sufiicient time has elapsed for the ex-.

hibition of the picture, the counter-shaft 34, and consequently theshaft 21, begins to rotate, the pitman will begin to raise the elevator, the arm 45 carrying with it, -in its .upward movement; the slide29, the latter being guided in the grooves. 51 and 51. The guides 51 and51 form a continuation of the slide guides 27 located immediately abovethem, and consequently the slide will be moved back into the guides 27from which it had been withdrawn in a previous operation. The crank 41is of such length that the elevator will be lifted; sufficiently tobringthe top edge of the arm 45 somewhat above the surfaces of theguardflanges 30.

Just as the top edge of the arm 45 comes level with the top surfaces ofthe flanges 30,,

during the upward movement of the arm,

the rotation of the drum begins to take place, the pin 39 of the disk 38having, by this time, moved through somewhat less than180 and havingbegun to engage in theagdjacent recess of theflange40 of the to revolve.

drum. During the slight remaining portion. of the upward movement of thearm 45, the drum will rotate, thereby moving the slide, which has justbeen raised, off from the edge of the arm 45 and onto a pair of pins 52with which the arm is provided. At the same time the next succeedingslide is approaching the opening in the guard flanges; 30. As soon asthe arm 45 has reached the limit of its upward movement, it begins toreturn, carrying with it, upon the pins 52, the slide which has justbeenraised, and depositing it gently upon the guard fianges'30.

Just as the edge of the arm 45, in the downward movement of the latter,comes level with the top surfaces of the guard flanges, the next,succeeding slide willbe brought into position upon it, the nextsucceeding pair of slide guides 27 being now in position above the guidegrooves 51 and 51. Just-at this time the pin 39 will leave the recess ofthe flange 40 which it has just ongaged and the drum will therefore belocked against movement until the next operation."

The arin45 will continue in its downward movement until it regains theposition shown in Figs. 4 and 6 where it will remain until the shafts 34and 21 are again causedslides contained in the drum are consecutivelyremoved from the guides in which they are held, brought into positionfor ex;- hibition of the pictures, and replaced in the guides.

For advertising and some other purposes it is desirable that a picturebe exhibited for a more or less lengthened period of time and then, asquickly as possible, replaced by another. I provide a mechanism whichautomatically efi'ects this, the construction of suclrmechanism being asfollows: Secured to the standard 22 is a bracket 52 (Figs. 5 and 6)carrying a bearing 53 which supports the outer end of a driving shaft54, the inner end of the shaft being supported in a bearing 55 withwhich the standard 22 is provided. Beyond the bearing 53, the

shaft 54 has secured to it a belt pulley 56' which is connected, by asuitable belt, with the driving pulley 57 of an electricmotor 58. Themotor- 58 is kept continuously running It will thus be seen that theduring the use of the apparatus, so that the shaft 54 revolvescontinuously. Loosely mounted upon the driving shaft 54 is a pinion 59which meshes with the gear wheel 33 carried by the counter-shaft 34 andis provided with a clutch pin 60 adapted to be intermittently engaged bya clutch .pin 61 carried by a corresponding clutch block 62 whichrotates with, but is slidably mounted on,. the driving shaft 54. In Fig.6 the clutch block 62 is shown in the position'in which the pin 61 isout of operative engagement with the pin 60. When the clutch block 62 isin this position, the pinion 59,

tooth wheel 33 and the related parts remain stationary. At predeterminedintervals, however, the block 62 is moved toward the left, whereupon thepin 61 engages the pin 60 and makes a driving connection between therevolving shaft 54 and the pinion 59, whereupon the tooth wheel 33 andrelated parts are caused to rotate, which rotation continues until thetooth wheel 33 has made one complete revolution. As soon as the wheel 33has made one revolution, the clutch block 62 will be automaticallythrown toward the 'right' and the driving connection between the drivingshaft 54 and the pinion 59 broken. The pinion 59, tooth wheel 33 and therelated parts will then remain stationary until the clutch is againoperated.

The mechanism for intermittently actuating the clutch block 62 is asfollows: A bridge 63 is secured between the brackets 37 and 52*, and isprovided with a substantially vertical web 64upon which is pivotallymounted a cam lever 65, the outer end 66 of which is located in the pathof a pin 67 carried upon the face of a worm wheel 68, the latter beingrotatably .mounted on the web 64 and meshing with a worm- 69 secured tothe shaft 54. The outer end 66 of the cam lever is formed with a camsurface, the effect of which is that, upon the pin 67 striking it, thelever 65 will be rocked in a clockwise direction upon its pivot. Projecting downwardly from the cam lever is a fork 70 carrying rollers whichengage in a circumferential groove 71 with which the clutch block 62 isformed. The consequence, therefore, of the tilting of the cam lever willbe that the clutch block 62 is thrown toward the left, a drivingconnection thereby being made between the shaft 54 and the pinion 59.The relation between the teeth of the worm wheel 68 and the thread ofthe worm 69 is determined according to the length of time during whichit is desired to expose each successive slide. In the device illustratedthe operation of replacing a slide j with the pinion 59, it is providedwith an arm 72, which extends inwardly toward the tooth wheel 33. Thetooth wheel 33 is provided with an outwardly extending peripheral flange73 having an opening 74 (Fig. 8) through which the end of the arm 7 2can pass upward when the lever 65 is tilted by the pin 67. As soon asthe lever 65 is thus tilted and the clutch 62 has therefore madeconnection with the. pininn; '59, the. teeth wheel 33 begins to rotateand the flange 73 passes beneath and engages under the end of the arm 72. The flange 7 3 thereafter prevents downward movement of the arm 72,which would result from a tilting of the lever 65 in a contra-clockwisedirection to throw out the clutch, and the clutch is therefore held inlocked 'condition'until the tooth wheel 33 has made a completerevolution.

Secured to the tooth wheel 33 adjacent the openin 74 of the flange 73and somewhat above t e same, is a cam plate 75 having a cam projection76 thereon. When the tooth wheel 33 has nearly completed its revolutionthe cam projection 76 will strike the top of the end of the arm 72 andwill force the latter downward, thereby rocking the lever 65 in acontra-clockwise direction and causing the clutch to unlock. In orderthat, when the clutch has thus been unlocked, the tooth wheel 33 mayremain stationary in the proper position ready for the next operation ofthe clutch, I provide an arm 77 which is pivoted to the standard 22 andcarries a roller 78 which runs upon the outer periphcry of an annularenlargement 79 of the disk 38, which. as will be remembered, is mountedupon the countershaft 34. -The annular enlargement 7 9, is provided withan arcshaped recess 80'into which the roller 7 8 is adapted to fall whenthe tooth wheel 33 reaches the position in which the cam projection 76has almost concluded the operation of forcing'the arm 72 of the camlever 65 downward." A tension spring 81 is connected between thestandard 22 and the outer end of the arm 77 in order that the roller 78may be drawn into the recess 80 with some degree of force. The result ofthis arrangement is that, when the tooth wheel 33 has almost completedits revolution and the cam projection 76 has nearly completed thedownward movement of the arm 72 of the cam lever 65 to disengage theclutch; the roller 7 8 will be just entering over the adjacent edge ofthe recess 80 and the spring 81 will then force the roller 7 8 downwardinto the recess 80, thereby definitely completing the last fraction ofthe revolutionof the tooth wheel 33, and definitely disengagingthe'clutch. v

In order to prevent the projection of light upon the, screen during thechanging of the slides, I. provide a shutter which is automaticallyopened by the elevator when the latter reaches the limit ofits movementand which closes as soon as the elevator starts its upward movement. vrangement is that a pictureis exhibited upon the screen for atimedetermined by the relation between the teeth of the worm wheel 68and the thread of the worm69, after which it isbutpif for the shortspace of time necessary for the changing of the slide; the screenremainin dark during thisperiod. When -..the' slide has been replacedbythe next suc- The effect of this arceeding one, the latter is exhibitedfor'a predetermined time as before.

In order to eiiect the above result, I provide a vertical plate 82 whichis disposed immediately against the rear frame 83 of the bellows ot thelantern. This plate has formed therein a rectangular aperture 84L of asize corresponding to that of the slides used. Pivoted at the points 85,to the plate 82, are two oppositely disposed leaves 86.

provided with inwardly extending arms 87 which overlap and are formedwith corresponding slots 88 for receiving a pin 89 carried by the innerend of a lever 90. The lever 90 is pivoted to the plate 82, and its end,remote from that which carries the pin 89, extends outward to one sideof the device in position to be engaged by a foot 91 which is secured tothe sliding block 48 of the elevator. The position or the lever 90 withrespect to the foot 91 of the elevator is such that the lever will beengaged by the foot91 just befor'ethe elevator reaches its lowestposition, so that during the last portion of the downward movement ofthe elevator the outer end of the lever'will be depressed, therebymoving the inner end ofthe lever upward and rocking the leaves 86outward about their pivots into the position shown in Fig. 7 of thedrawings. A tension spring 92 connected between a downwardly ex: tendingarm 93 and the inner end of the lever 90. This spring effects adownwardmovement of the inner end of the lever as soon as the latter is enabledto move by reason of the foot 91 rising during the first part oi, theupward movement of the elevator to change a slide.

' Pivoted at 94: to the leaves 86 are a second pair of leaves 95, theinner edges of which are vertical. The leaves 95 are provided withforwardly extending pins 96 which enter grooved slots 97 formed in theplate 82; they are also provided with arc-shaped slots 98 which receivepins 99 which project rearwurdly from the leaves 86. The slots 98 arecurved in an arc of the circle whosecenter is at the pivots 94, and theyoperate, to gether with the slots 97, to maintain the inner edges of theleaves 95 vertical during the movement of these leaves toward and awayfrom each other when the leaves 86 are rocked by the moven'ient ojt-thelever 90. The parts are of such size that the leaves 95 will slightlyoverlap when they are brought together by the action of the spring 92.

The operation of the shutter is as follows: In. the position shown inFig. 7, the elevator is in its lowermost position and the slide is beingexposed. As soon as the de termined period for the exposure of the slidehas expired, the elevator will begin to move upward and the foot 91.Willcease to .press upon the outer end of the lever 90.

The lever 90 will then he rocked by the action of the spring 92, itsinner end being drawn down and the arms 87 of the leaves 86 being alsodepressed, with the result that the leaves 86 are rocked toward oneanother. The leaves 86, in their movement, carry with them the leaves 95which latter therefore move toward one another, their inner edges beingmaintained vertical by reason of the engagement of their pins 96 in theslots 97 and of the engagement of the pins 99 of the leaves 86 in theslots 98 of the leaves 95. The shutter is thereby closed during thechanging ot' the slide and will only be opened again when the elevatoragain descends and the foot 91 presses upon the outer end of the lever90 to reverse the above. described operation.

The device as described above is particularly useful for advertlsingpurposes, in

that the slides carried by the drum will be successively exposed to longas the motor 58 continues to run. No attention is required, and there isno danger of accidental stoppage occurring. In the use of a lantern forexposing the slides for the purpose of illustrating a lecture or thelike, however, it is desirable to be able to change the slide at willduring the progress of the lecture and a much greatentirne is oftenconsumed between the exposures of one pair of slides than would beconsumed between the exposures of another pair. To enable the device tobe used conveniently for lecturing purposes, I provide means foractuating the clutch block 62 at will; instead of automatically atpredetermined intervals of time. i

To the above. end I provide an electro magnet 100 which is locatedbeneath the shaft 54, and the armature of which is mounted upon an arm101 secured to a rock shaft 102 mounted in the bracket 52. The arm 101engages at its upper end in the circumferential recess 71 of the clutchblock 62 so that, upon the armature being attracted, the clutch blockwill be moved toward the left to cause the shaft 54, to drive the pinion59, and therefore the drum and elevator operating mechanism. A lightspring 103 is connected between the bracket 52 and the arm 101 to aidthe latter in its return movement when. the clutch is disconnected.Mounted upon the counter-shaft is a pinion 10 iv which meshes with asecond pinion 105 carried by a shaft 106 mounted 1n bearings in thebracket 37, the relation between the teeth of the pinion 105 and thoseof the pinion 101 being that oftwo to one, so that the shaft 106 willrotate at half the speed of the shaft 34-. The shaft 1106 extendsoutward beyond the bracket 37 and has mounted upon its outer end aninsulating disk 107, made of fiber or similar material. To the outersurface ot the disk 107 is secured a metallic dish 108 of lessdiamearound the disk. is carried by the web 64 of the bridge 63 and terthan the disk 107 and having a project-- ing lug 109 which extendsoutwardly to the periphery of the disk 107. An insulating block 110 issecured to the bracket 37 adjacent the disk 107 andcarries upon itsupper and lower surfaces a pair of spring contact brushes -111 and 112,respectively, which bear upon the periphery of the insulating disk 107.A spring contact 113 is mounted upon the insulating block 110 and isarranged to engage the surface of the metallic disk 108.

Upon the shaft 54 is mounted an insulating disk 114, in the periphery ofwhich is let a metallic strip 115 which extends almost An insulatingblock 116 supports a pair of spring contact fingers 117 and 117* whichbear upon the periphery of the disk 114, and therefore, during the majorportion of the revolution of the disk 114, upon the metallic strip 115.Contact is thus continuously made between the spring fin gers 117 and117, except during that time in which the portion of the disk 114 whichis disposed between the ends of the strip 115 engages the fingers 117and 117, during which time these fingers are disconnected. The disk 114is so disposed that the fingers 117 and 117 will bear upon the portionof the disk which is between the ends of the strip 115 when the pin 61of the clutch member 62 is opposite the pin (30 of the pinion 59.

By this means operation of the clutch is prevented when the pin 61 isopposite to the pin 60. An attempt to actuate the clutch under theseconditions would be dangerous in that a partial operation might result,which par-' tial operation would probably have the efiect. of damagingthe mecnamsm, as for instance,

by the end of the arm 72 of the cam leverbeing struck by the projectingend of the flange 73 of the tooth wheel 33.

The connections will be readily understood from Fig. 12 of the drawings.The terminal of the magnet 100 connected to the terminal of a battery118, the other terminal of the battery being connected to the springcontact 117.. The spring contact 117 is connected to the spring contact113 which, supposing the disk 107 to be in the position.

shown in Fig. 5, is connected, through the metallic plate 108, to thebrush 112. The brush 112 is connected to the binding terminal 119 towhich is connected one contact 120 of a two-way switch 121. The switch121'is connected to another binding terminal 122 from which a wire leadsto the other terminal of the magnet 100, whereby the circuit iscompleted. The second brush, 111, is connected to a third bindingterminal 123, from which a wire leads to the second contact, 124, of thetwo-way switch 121.

The operation of the device is as follows: Supposing the disk 107 to bein the position shown in Fig. 5 and the switch 121 to be in connectionwith the contact 120; current will pass from the battery to the contactfinger 117; thence to the contact finger 117 and spring contact 113;thence, through the disk 109,. to the contact finger 112; thence, viathe binding terminals 119, to the contact 120 and switch 121; thence,via the binding terminal 122, to the magnet 100; and thence back to thebattery. The current passing through the magnet 100 will attract itsarmature, whereby the clutch block 62 will be moved to the left to causethe shaft 5-4 to drive the pinion 59, tooth wheel 33, and the relatedparts. The rotation of the counter-shaft 34 will, through the pinions104 and 105, effect a like rotation, but at half the speed, of the disk107 with the effect that the lug 109 of the disk 108 will pass away fromthe contact finger 112, the connection being thereby broken. The clutchwill, however, be prevented from moving back by the engagement of theend of the arm 7 2'upon the upper surface of the flange 73 of the toothwheel 33. By the time that the clutch is again thrown out the toothwheel 33 will have passed through a complete revolution and the pinion105 and disk 1071 therefore, through one-half a revolution, the lug 109of the disk 108 being then in position beneath the contact finger 111(Fig. 12). The slide which has, by the above operation, been broughtinto position for exposure, will remain exposed until the switch 121 ismoved over to make connection with the contact 124. When this is done,current flows from the battery 118 to the contact finger 117 thence tothe contact finer 117 and spring contact 113; thence,

111; thence, via the binding terminal 123, to

the switch, contact 124 and switch 121; thence, viathe binding terminal122, to the magnet 100; and thence back to the battery, whereupon theabove described] operation will again occur. i

In describing the above operations it has been presupposed that thespring fingers 117 and 117 are connected by the metallic strip 115 uponthe disk 114. If the switch should have been operated at a time when thepin 61 of the clutch block 62 was opposite the pin 60 of the pinionpass, owing to the fact that the spring fingers 117 and 117 would,atthat time, be bearing upon the surface of the insulating disk 114betweenthe ends of the strip 115. As soon, however, as the disk 114 hasrotated far enough for the strip 115 to make contact between the fingers117 and 117, current can pass and the above described operations willtake place. WVhen the clutch block 62 is to be operated by the switch121,-the worm wheel 68 should be removed.

In order to facilitate the manipulation of the slides and to enable theattendant to de- 59, current could not termine the positions, in thedrum, of the particular slides, I stamp,- or otherwise mark, two seriesof numbers (Fig. 3) upon one side wall of the drum, the number beingduplicated in each series but being in reversed positions, so that thenumbers at the top and at the bottom of the drum may be read easily. Thenumbers are placed upon the drum opposite the slide guides 27 anddesignate the slides contained in those guides. A pointer 126 is placedupon the standard 22 opposite to the openings 30 of the guard flanges30. This pointer indicates the number of the slide which is beingexosed.

p In the use of the machine, a lantern slide is placed in each of theslide guides 2'? of the drum, there being fifty of these guides in themagazine of the aperture described above. lhis may easily be effected ifthe cam lever is first removed. When the lever 65 has been removed thewheel 33 can be eontinu ously revolved, and the slides can be insertedone by one from the top of the drum. When the slides have been placed inthe drum the motor 58 is started by means of a'suitable switch and theshaft 54 is thereby caused to revolve, driving'the worm wheel 68. Duringthis time a slide, say the slideopposite the number 26 on the drum, isbeing exposed. After a time, the pin 67 will strike the cam lever andthereby cause the clutch block 62 to drive the pinion 59, which latter,in turn, drives the tooth wheel 33. Immediately the tooth wheel 33begins to revolve, the elevator will start to rise and the shutter willclose. The elevator continues to rise until it has replaced the slide inthe guides opposite to the number 26, whereupon it receives the slidefrom the guides oppositethe number 27, and brings it down into positionfor exposure, the shutterbeing opened during the latter part of thismovement. Just at this time the clutch will be thrown out by reason ofthe cam projection 76 of the gear wheel 33 striking the arm 72 0f thecam lever 65, the pin 67 having by this time, passed away from the endof the cam lever. The parts will now be held stationary, and the slidewill be exposed, until the pin 67 again strikes, and operates," the camlever 65. If it is desired to expose the slides at will, instead ofautomatically at predetermined periods, the worm wheel 68 is removed andthe clutch block 62 operated by the switch l21,'as described above.

What I claim as new and desire to secure by Letters Patent, is:

1. In a picture exhibiting machine, a slidesupporting drum having aplurality of slide receiving guides therein, a slide carrier, a crankconnected with said slide carrier so as to impart a linear movementthereto toward and away from said drum, said carrier and said crankbeing connected so that said crank reaches one of its dead centers whensaid crank is ad acent said drum, means for normally holding said drumin such posirelation with said slide carrier, and means for moving saiddrum. to bring another of slide-receiving guides therein, a slidecarrier adapted to be moved toward and away from said drum, a guide forsaid slide carrier, a shaft passing axially through said tlon that oneofsaid guides is in operative drum, a crank connection between said ,shaftand said slide carrier, whereby the rotation of said shaft will cause amovement of said slide carrier toward and away from said drum, saidcrank, connection being such that the crank reaches one of its deadcenters when said slide carrier is adjacent said drum, means fornormally holding said drum in such position that one of its guides is inoperative relation with saidslide carrier, and means for moving saiddrum to bring another of its guides into operative relation with saidslide carrier, such movement occurring during that part of the movementof said slide carrier in which said slide carrier is adjacent said drum.

3. Ina picture exhibiting machine, a driving member,'a slide supportingdrum having a plurality of slidereceiving guides therein, a slidecarrier adapted to be moved toward and away from said drum, mocha nism,operatively connected with said driving member for gradually moving saidslide carrier'from an exposing position toward said drum, andsubsequently by the continued action of said driving member and the samemechanism away from said drum back to exposing position, such mechanismbeing so arranged as to allow said slide carrier to dwell during thepart of its movement when it is adjacent said .drum, means for normallyholding said drum in such position that one of said guides is inopera-tlve relation vith said slide carrier, and means, connected withsaid driving member, for moving said drum to bring another of saidguides into opera' tive relation with said slide carrier, such movementoccurring during that part of the movement of said slide carrier inwhich said slide carrier is adjacent said drum. I

4. In a picture exhibiting machine, a driving member, a slide supportingdrum hav ing a plurality of slide receiving guides therein, a slidecarrier adapted to be moved toward and away from said drum, mechanism,operatively connected with said driving member for gradually moving saidslide carrier from anexposing position toward said drum, andsubsequently by the continued action. of saiddriving member and the samemechanism away from said drum back to exposing position, such mechanismbeing so arranged as to allow said slide carrier to dwell during thepart of its movement, means for normally holding said drum in suchposition that one of said guides is in operative relation with saidslide carrier,

- means, connected with said driving member,

for moving said drum to bring another of said guides into operativerelation with said slide carrier, such movement occurring during thatpart of the movement of said slide carrier in which said slide carrieris adjacent said drum, and a device for intermittently operating saiddriving member.

5. In a picture exhibiting machine, a driving member, a drum supportedto rotate on a horizontal axis, a slide carrier adapted to be movedtoward and away from said drum, a shaft passing axially through saiddrum, a crank connection between said shaft and said slide carrier,whereby rotation of said shaft effects a movement of said slide carriertoward and away from said drum, said crank guides into operativerelation with said slide carrier, such movement occurring during thatpart of the movement of said slide carrier in which said slide carrieris adjacent said drum. A

G. In a picture exhibiting machine, a driving member, a drum supportedto rotate on a horizontal axis, a slide carrier adapted to be movedtoward and away from said drum, a shaft passing axially through saiddrum, a crank connection between said shaft and said slide carrier,whereby rotation of said shaft eii'ects a movement of said slide carriertoward and away from said drum, said crank connection being such thatthe crank reaches one of its dead centers when said slide carrier isadjacent said drum, means for normally holding said drum in suchposition that one of said guides is in operative relation with saidslide carrier, means connected with said driving devlce for moving saiddrum for bringing another of said guides into operative relation withsaid slide carrier, such movement occurring during that part of themovement of said slide carrier in which said slide carrier is adjacentsaid drum, and a device for lntermlttently negating said driving member.

'LIn a picture exhibiting 1nachine,'a vertically disposed slidesupporting drum sup-- ported to rotate upon a horizontal axis, and

having a plurality of slide receiving guides therein, a slide carrierdisposed beneath said drum substantially vertically below the axisthereof, mechanism for moving said slide carrier toward said drum andsubsequently by the continued action of the same mechanism, graduallyaway from said drum to an exposing position, means for normally hold-1ing said drum in such position that one of said guides is in operativerelation with said slide carrier, and means for moving said drum tobring another of said guides into operative relation with said slide carrier, such movement occurring during that part of the movement of saidslide carrier in which said slide carrier is adjacent said drum.

8. In a picture exhibiting machine, in combination, a rotatably mounteddrum, having a series of regularly disposed radial slide-receivingguides therein, a slide carrier movable toward and away from said drum,to move the slides from and replace them in, the guides of said drum, ashaft, means, actuated by said shaft, for effecting a movement of saidcarrier toward and away from said drum for each revolution of saidshaft, a driving member, a connection between said -driving member andsaid shaft, whereby each revolution of said driving member effects onerevolution of said shaft, a connection between said driving member andsaid drum, whereby each revolution of said driving member moves saiddrum through a distance equal to the distance between a pair of saidslide-receiving guides, and means for intermittently rotatingsaiddriving member.

'9. In a picture exhibiting machine, in combination, a rotatably mounteddrum, having a series of regularly disposed radial slide-receivingguides therein, a slide carrier movable toward and away from said drum,to move the slides from and replace them in, the guides of said drum, ashaft, means, actuated by said shaft, for effecting a movement of saidcarrier toward and away from said drum for each revolution of saidshaft, a driving member, a connection be tween said driving member andsaid shaft, whereby each revolution of said driving member effects onerevolution of said shaft, a connection between said driving member andsaid drum, whereby each revolution of said driving member moves saiddrum through a distance equal to the distance between a pair of saidslide-receiving guides, means for intermittently rotating said drivingmember, and means for locking said driving member when the same is notbeing rotated.

q 10. In a picture exhibiting machine, in combination, a rotatablymounted drum, having a series of regularly disposed radialslide-receiving guides therein, a slide carrier movable toward and awayfrom said drum, to move the slides from and replace them in, the guidesof said drum, a shaft, means, actuated by said shaft, for effecting amovement of said carrier toward and away from said drum for eachrevolution of said shaft, a driving member, a connection between saiddriving member and said shaft, whereby each revolution of said drivingmember effects one revolution of said shaft, a connection between saiddriving member and said drum, whereby each revolution of said drivingmember moves said drum through a distance equal to the distance betweena pair of said slide-receiving guides, means for intermittently rotatingsaid driving member, a shutter, operating mechanism for said shutter,having a projecting portion, and means carried by said slide carrier forengaging said projecting portion, and opening said shutter, when saidslide carrier is near the position in which it is farthest removed fromsaid drum.

11. In a picture exhibiting machine, in combination, a rotatably mounteddrum, having a series of regularly disposed radial slide-receivingguides therein, a slide carrier movable toward and away from said drum,to move the slides from and replace them in, the guides of said drum, a"shaft, means, actuated by said shaft, for efi'ecting a movement of saidcarrier toward and away from said drum for each revolution of saidshaft, a driving member, a connection be tween said driving member andsaid shaft,

whereby each revolution of said driving member effects one revolutlon ofsaid shaft, a connection between sald driving member .and said drum,whereby each revolution of said driving member moves said drum.

through a distance equal to the distance between apalr of saidslide-receiving guides, means for intermittently rotating said drivingmember, a main drive shaft, a clutch @opies of this patent may beobtained 1 connection between said main drive shaft and said driving,member, means, operatively connected with said main drive shaft, forintermittently throwing in said clutch, and means for throwing out saidclutchafter said driving member has turned through one revolution. l

12. In a picture exhibiting machine, in combination, a rotatably mounteddrum, having a series of regularly disposed radial slide-receivingguides therein, a slide carrier movable toward and away from said drum,to 'move the slides from and replace them in, the guides of said drum,ashaft, means, actuated by said shaft, for efi'ecting a movement of saidcarrier toward and away from said drum for each revolution of saidshaft, a driving member, a connection between said driving member andsaid shaft, whereby each revolution of said driving member effects onerevolution of said shaft, a connection between said driving member andsaid drum, whereby each revolution of said driving member moves saiddrum through a distance equal to the distance between a pair of saidslidereceiving guides, means for intermittently rotating said drivingmember, a main drive shaft, a clutch between said main drive shaft andsaid driving member, a movable device connected with said clutch andforming a stop adapted to lock said driving member against rotation whensaid clutch is thrown out, means for intermittently throwing said clutchin and removing said stop from its operative position, and means forthrowing said clutch out and returning said stop to its operativeposition after said driving member has moved the part of its movementwhen it 'is adja cent said drum, and to bring said slide carriersubstantially level with the upper surface of said guard flanges at themoment it receives a slide, means for normally holding said drum in suchposition that one of said guides is in operative relation with saidslide carrier, and means, connected with said driving member, for movingsaid drum to bring another of said guides into operative position withsaid carrier, such movement occurring during thatpart of the'movement ofsaid slide carrier in which said slide carrier is adjacent said drum.

In witness whereof, I have hereunto subscribed my name in the presenceof two witnesses.

- CHARLES A. BRAUN.

Witnesses: 1

CHARLES Gr. Corn, JEAN BENNET.

Washington, D. 0.

